DOAG conference 2018 Call for Paper is open

Call for Paper is open. (Take a look on the timetable.)

For Engineered Systems please use the „Infrastructure“ Stream.

We had a wide range of topics :-)

https://2018.doag.org/en/speakers/

 

Exadata troubleshooting easy with GetExaWatcherResults.sh

If you have for example a performance problem or a crash on your Exadata Machine and you need an overview about the machine then use the very powerful tool „GetExaWatcherResults.sh“ which based on the data of Exawatcher.

GetExaWatcherResults.sh give you a details about:

  • CPU utilization and details
  • IO Summary
  • and more

GetExaWatcherResults.sh will generate very good graphics and that is what I will show now.

How is the way to get these graphs?


 (more...)

Secure Erase of an Exadata System

What has to be done when the Lifecycle of an Exadata System comes to the end.

You need to do an secure erase of DB and Storage nodes.

By the way you can also secure erase the Switches and PDU, etc. but this is not described in this article.

Documentation

https://docs.oracle.com/cd/E80920_01/DBMSQ/exadata-secure-erase.htm#DBMSQ-GUID-DE6BBDF7-6BCB-412B-AD1E-E0FFEEFCC3AA

and  My Oracle Support Doc ID 2180963.1

Steps to do

I use the method via bootable USB Stick

Download Boot (more...)

Oracle Essential Support Tools im Exadata Umfeld

Mein DOAG Vortrag zum Thema

„Oracle Support wie gehe ich vor und welche Tools setze ich im Exadata Umfeld ein“

Exadata_Oracle_Support_V1.1

Hinweis:

In der Zwischenzeit hat Oracle eine neue Version den Trace File Analyzer bereitgestellt die man dann auch einsetzen sollte. Einfach über die Doc-ID suchen.

TFA Collector – TFA with Database Support Tools Bundle (Doc ID 1513912.1)

Noch eine Anmerkung für alle die gerade PSU’s etc. eingespielt haben. Leider stellt Oracle Support (more...)

Exadata Flash Cache enabled for Write Back

During Tests for an Migration of a major customer application we saw in our AWR reports that most of the jobs are very write intensive. This was the point where we would like to test what happens when we change the Flash Cache Mode from Write Through to Write Back.

What are the main benefits of Write Back mode:

  • it improves the write intensive operations while writing to flash cache is faster than writing to (more...)

Important Change for Grid 12.2 Upgrade and MGMTDB

I just did an Grid Infrastructure Update to Oracle 12.2 with the latest PSU Aug 2017.

I did my preparation with the help of the Doc ID 2111010.1

„12.2 Grid Infrastructure and Database Upgrade steps for Exadata Database Machine running 11.2.0.3 and later on Oracle Linux“

In the Post-upgrade Steps was written that the Management DB should be deconfigured

  • Post-upgrade Steps

      • Deconfigure MGMTDB

 

The deconfigure is obsolete and the (more...)

Exadata 18 available

Yes, that great news for all Exadata guys.

The documentation is also updated. So please check first the Maintenance Guide.

Oracle Exadata Database Machine Maintenance Guide.

Have fun :-)

 


Flashback in a Data Guard Environment but what are the steps

The Setup of an Data Guard environment with Physical Standby via Data Guard Broker was done including an Switchover. Everything fine and works as expected. (Oracle Release is 12.1.0.2 and PSU Jan 2017).

The Dev Team asked for a Flashback Database if possible a few days ago. Okay no problem. But what do I have to do exactly.

What are the steps to do? ( The requested timestamp for Flashback on (more...)

Problems with Adaptive Features in 12.1.0.2 What’s to do?

The Adaptive Features is divided in two parts

  • Adaptive Plans
    • the possibility to change plans during execution
  • Adaptive Statistics
    • the statistics allow plans to be built from the results of previous executions

Version 12.1 

In 12.1 both components  will be managed by the parameter „optimizer_features_enable“ and is per default on „TRUE“.

Version 12.2

In 12.2 the parameter „optimizer_features_enable“ obsolete. The adaptive feature is now controlled by two parameters

  • optimizer_adaptive_statistics default „FALSE“
  • (more...)

Oracle RU is available

Today Oracle released a very large „monster“ Upgrade. This July 2017 Update includes the first time the new RU „Release Upgrade“ and RUR „Release Update Revision“ Patches.

To be up to date read the following My Oracle Support Doc-ID’s

Actually I can’t find a FAQ but I think this (more...)